Message-ID: <562A9FD4.2080408@gmail.com>
Date: Fri, 23 Oct 2015 23:00:04 +0200
From: IZ7SLZ <iz7slz.domenico@gmail.com>
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To: rsgb_lf_group@blacksheep.org
References: <8D2DBEB74982BB1-FF8-6C9931@webmail-vm145.sysops.aol.com> <8D2DBEBB12B8776-BA0-6D04CF@webmail-vm118.sysops.aol.com>
In-Reply-To: <8D2DBEBB12B8776-BA0-6D04CF@webmail-vm118.sysops.aol.com>
Subject: Re: LF: Coherent BPSK on LF using EbNaut
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Hi all,

Markus, thank you for the report.
The small difference in QRG is due probably to the fact that i'm not 
using resample now.
Transmission of 6 char./3s with 10 W will start in few seconds.
GL

Domenico / iz7slz


On 10/23/2015 10:51 PM, Markus Vester wrote:
> Hi Domenico, Paul,
> good decode again from the first transmission which started 
> accurately at 20:00 UT. I only noticed that I had to reduce the 
> frequency offset by half a milliHz compared to earlier tests.
> Best 73,
> Markus (DF6NM)
>
> -----Ursprüngliche Mitteilung-----
> Von: IZ7SLZ <iz7slz.domenico@gmail.com <mailto:iz7slz.domenico@gmail.com>>
> An: rsgb_lf_group <rsgb_lf_group@blacksheep.org 
> <mailto:rsgb_lf_group@blacksheep.org>>
> Verschickt: Fr, 23 Okt 2015 9:47 pm
> Betreff: Re: LF: Coherent BPSK on LF using EbNaut
> Good evening Paul, Markus and all,
>
>    
>
>   
> thank you for your updates.
> I will start some EbNaut transmission at 22.00 each hour and hope that
>
>   Paul can make some measurement on my signal . Qrg is 137502.24 Hz
> Initial trasmission at 22.00 will contains 22 characters at 1 s/symbol
>
>   and will be sent with 100 W power output.
> Following transmissions will contains 6 characters at 3 s/symbol and
>
>   should be sent with 10 W.
>
>   Coding scheme: 8K19A.
>
>   
>   
>
>   GL.
> 73, Domenico / iz7slz
>
>    
>
>    
>
>    
>
>   
> On 10/23/2015 7:00 PM, Paul Nicholson wrote:
>
>   >
>
>   > I have an E-field rx running on the 137 kHz band,
>
>   > GPS locked.
>
>   >
>
>   > Here is the 'first light' spectrogram
>
>   >
>
>   >http://abelian.org/tmp/lf151023a.png  
>
>   >
>
>   > which covers 137 kHz to 138.5 kHz.
>
>   >
>
>   > It's a bit shaky, everything held together with
>
>   > croc clips but hopefully will survive long enough
>
>   > to pick up an amateur signal or two.
>
>   >
>
>   > I'm recording 135 to 138.5 kHz.   I reckon the battery
>
>   > is good for about 60 hours.
>
>   >
>
>   > Maybe there will be some distant unmodulated carriers
>
>   > to measure, or even a coherent BPSK message.
>
>   >
>
>   > 137.5 kHz looks quiet here.
>
>   >
>
>   > --
>
>   > Paul Nicholson,
>
>   > Todmorden, UK.
>
>   > --
>
>   >
>
>   >
>
>    
>
>    
>
>   
>
>


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    <div class="moz-cite-prefix">Hi all,<br>
      <br>
      Markus, thank you for the report. <br>
      The small difference in QRG is due probably to the fact that i'm
      not using resample now. <br>
      Transmission of 6 char./3s with 10 W will start in few seconds.<br>
      GL<br>
      <br>
      Domenico / iz7slz<br>
      <br>
      <br>
      <br>
      On 10/23/2015 10:51 PM, Markus Vester wrote:<br>
    </div>
    <blockquote
      cite="mid:8D2DBEBB12B8776-BA0-6D04CF@webmail-vm118.sysops.aol.com"
      type="cite">
      <div style="color: black; font-family: arial; font-size: 10pt;"><span
          style="display: inline-block;" contenteditable="false"></span></div>
      <div><span style="display: inline-block;"></span>Hi Domenico,
        Paul,</div>
      <div id="AOLMsgPart_2_2039d863-f8e2-49be-94c5-01639c56b1f0">
        <div> </div>
        <div>good decode again from the first transmission which started
          accurately at 20:00 UT. I only noticed that I had to reduce
          the frequency offset by half a milliHz compared to earlier
          tests.</div>
        <div> </div>
        <div>Best 73,</div>
        <div>Markus (DF6NM)</div>
        <div> </div>
        <div><br>
        </div>
        -----Ursprüngliche Mitteilung----- <br>
        Von: IZ7SLZ &lt;<a moz-do-not-send="true"
          href="mailto:iz7slz.domenico@gmail.com">iz7slz.domenico@gmail.com</a>&gt;<br>
        An: rsgb_lf_group &lt;<a moz-do-not-send="true"
          href="mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org</a>&gt;<br>
        Verschickt: Fr, 23 Okt 2015 9:47 pm<br>
        Betreff: Re: LF: Coherent BPSK on LF using EbNaut<br>
         
        <div
          id="aolmail_AOLMsgPart_0_ad196ab4-1d46-4668-b015-82b57a285dd7"
          style="margin: 0px; color: rgb(0, 0, 0); font-family: Tahoma,
          Verdana, Arial, Sans-Serif; font-size: 12px; background-color:
          rgb(255, 255, 255);"><tt>
            <pre style="font-size: 9pt;">Good evening Paul, Markus and all, 

  
 </pre>
            <pre style="font-size: 9pt;">thank you for your updates. </pre>
            <pre style="font-size: 9pt;">I will start some EbNaut transmission at 22.00 each hour and hope that  

 Paul can make some measurement on my signal . Qrg is 137502.24 Hz </pre>
            <pre style="font-size: 9pt;">Initial trasmission at 22.00 will contains 22 characters at 1 s/symbol  

 and will be sent with 100 W power output. </pre>
            <pre style="font-size: 9pt;">Following transmissions will contains 6 characters at 3 s/symbol and  

 should be sent with 10 W. 

 Coding scheme: 8K19A. 

 </pre>
            <pre style="font-size: 9pt;"> 

 GL. </pre>
            <pre style="font-size: 9pt;">73, Domenico / iz7slz 

  
 </pre>
            <pre style="font-size: 9pt;">On 10/23/2015 7:00 PM, Paul Nicholson wrote: 

 &gt; 

 &gt; I have an E-field rx running on the 137 kHz band, 

 &gt; GPS locked. 

 &gt; 

 &gt; Here is the 'first light' spectrogram 

 &gt; 

 &gt;  <a moz-do-not-send="true" href="http://abelian.org/tmp/lf151023a.png" target="_blank">http://abelian.org/tmp/lf151023a.png</a> 

 &gt; 

 &gt; which covers 137 kHz to 138.5 kHz. 

 &gt; 

 &gt; It's a bit shaky, everything held together with 

 &gt; croc clips but hopefully will survive long enough 

 &gt; to pick up an amateur signal or two. 

 &gt; 

 &gt; I'm recording 135 to 138.5 kHz.   I reckon the battery 

 &gt; is good for about 60 hours. 

 &gt; 

 &gt; Maybe there will be some distant unmodulated carriers 

 &gt; to measure, or even a coherent BPSK message. 

 &gt; 

 &gt; 137.5 kHz looks quiet here. 

 &gt; 

 &gt; --  

 &gt; Paul Nicholson, 

 &gt; Todmorden, UK. 

 &gt; --  

 &gt; 

 &gt; 

  
 </pre>
          </tt> <br>
        </div>
        <br>
      </div>
    </blockquote>
    <br>
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